Check
the appropriate box to designate the rule pursuant to which this Schedule is filed:

a.

☐
Rule 13d-1(b)

b.

☒
Rule 13d-1(c)

c.

☐
Rule 13d-1(d)

*The
remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the
subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided
in a prior cover page.

The
information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section
18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the Notes).

This
Schedule 13G is being filed on behalf of (i) Mitchell P. Kopin, an individual who is a citizen of the United States of America
(“Mr. Kopin”), (ii) Daniel B. Asher, an individual who is a citizen of the United States of America (“Mr.
Asher”) and (iii) Intracoastal Capital LLC, a Delaware limited liability company (“Intracoastal”
and together with Mr. Kopin and Mr. Asher, collectively the “Reporting Persons”).

The
Reporting Persons have entered into a Joint Filing Agreement, a copy of which is filed with this Schedule 13G as Exhibit
1, pursuant to which the Reporting Persons have agreed to file this Schedule 13G jointly in accordance with the provisions
of Rule 13d-1(k) of the Securities Exchange Act of 1934, as amended.

Common
stock, $0.0001 par
value per share, of the Issuer (the “Common Stock”).

(e)
CUSIP Number

09072V402

Item 3.If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

Not
applicable.

Page 5 of 9

Item 4.Ownership.

(a)
and (b):

(i) Immediately
following the consummation of the underwritten public offering by the Issuer on February 12, 2019 (the “Offering”)
(as disclosed in the Form 424B4 prospectus filed by the Issuer with the Securities and Exchange Commission on February 11, 2019),
each of the Reporting Persons may have been deemed to have beneficial ownership of 1,206,568 shares of Common Stock, which consisted
of (i) 1,187,500 shares of Common Stock held by Intracoastal and (ii) 19,068 shares of Common Stock issuable upon an exercise
of a warrant held by Intracoastal (“Intracoastal Warrant 1”), and all such shares of Common Stock in the aggregate
represent beneficial ownership of approximately 9.99% of the Common Stock, based on (1) 5,808,692 shares of Common Stock outstanding
as of February 11, 2019 as reported by the Issuer, plus (2) 6,250,000 shares of Common Stock shares
of Common Stock that were issued at the closing of the Offering and (3) 19,068 shares of Common Stock issuable upon an
exercise of Intracoastal Warrant 1. The foregoing excludes (I) 1,168,432 shares of Common Stock issuable upon exercise of Intracoastal
Warrant 1 because Intracoastal Warrant 1 contains a blocker provision under which the holder thereof does not have the right to
exercise Intracoastal Warrant 1 to the extent (but only to the extent) that such exercise would result in beneficial ownership
by the holder thereof, together with the holder’s affiliates, and any other persons acting as a group together with the
holder or any of the holder’s affiliates, of more than 9.99% of the Common Stock, (II) 230,000 shares of Common Stock issuable
upon exercise of a second warrant held by Intracoastal (“Intracoastal Warrant 2”) because Intracoastal Warrant
2 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 2 to the
extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the
holder’s affiliates, and any other persons acting as a group together with the holder or any of the holder’s affiliates,
of more than 9.99% of the Common Stock, (III) 9,683 shares of Common Stock issuable upon exercise of a third warrant held by Intracoastal
(“Intracoastal Warrant 3”) because Intracoastal Warrant 3 contains a blocker provision under which the holder
thereof does not have the right to exercise Intracoastal Warrant 3 to the extent (but only to the extent) that such exercise would
result in beneficial ownership by the holder thereof, together with the holder’s affiliates, and any other persons acting
as a group together with the holder or any of the holder’s affiliates, of more than 4.99% of the Common Stock, (IV) 55,555
shares of Common Stock issuable upon exercise of a fourth warrant held by Intracoastal (“Intracoastal Warrant 4”)
because Intracoastal Warrant 4 contains a blocker provision under which the holder thereof does not have the right to exercise
Intracoastal Warrant 4 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder
thereof, together with the holder’s affiliates, and any other persons acting as a group together with the holder or any
of the holder’s affiliates, of more than 4.99% of the Common Stock, (V) 55,000 shares of Common Stock issuable upon exercise
of a fifth warrant held by Intracoastal (“Intracoastal Warrant 5”) because Intracoastal Warrant 5 contains
a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 5 to the extent (but
only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder’s
affiliates, and any other persons acting as a group together with the holder or any of the holder’s affiliates, of more
than 4.99% of the Common Stock, and (VI) 12,083 shares of Common Stock issuable upon exercise of a sixth warrant held by Intracoastal
(“Intracoastal Warrant 6”) because Intracoastal Warrant 6 contains a blocker provision under which the holder
thereof does not have the right to exercise Intracoastal Warrant 6 to the extent (but only to the extent) that such exercise would
result in beneficial ownership by the holder thereof, together with the holder’s affiliates, and any other persons acting
as a group together with the holder or any of the holder’s affiliates, of more than 4.99% of the Common Stock. Without such
blocker provisions, each of the Reporting Persons may have been deemed to have beneficial ownership of 2,737,321 shares of Common
Stock.

Page 6 of 9

(ii) As
of the close of business on February 15, 2019, each of the Reporting Persons may have been deemed to
have beneficial ownership of 1,338,366 shares of Common Stock,
which consisted of (i) 1,187,500 shares of Common Stock issuable upon exercise of Intracoastal Warrant 1 and (ii) 150,866
shares of Common Stock issuable upon exercise of Intracoastal Warrant 2, and all
such shares of Common Stock represented beneficial ownership of approximately 9.99% of
the Common Stock, based on (1) 5,808,692 shares of Common Stock outstanding as of February
11, 2019 as reported by the Issuer, plus (2) 6,250,000 shares of Common Stock shares of Common
Stock that were issued at the closing of the Offering, (3) 1,187,500 shares of Common Stock issuable upon exercise of Intracoastal
Warrant 1 and (4) 150,866 shares of Common Stock issuable upon exercise of Intracoastal Warrant 2. The foregoing excludes (I)
79,134 shares of Common Stock issuable upon exercise of Intracoastal Warrant 2 because Intracoastal Warrant 2 contains a blocker
provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 2 to the extent (but only to
the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder’s affiliates,
and any other persons acting as a group together with the holder or any of the holder’s affiliates, of more than 9.99% of
the Common Stock, (II) 9,683 shares of Common Stock issuable upon exercise of Intracoastal Warrant 3 because Intracoastal Warrant
3 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 3 to the
extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the
holder’s affiliates, and any other persons acting as a group together with the holder or any of the holder’s affiliates,
of more than 4.99% of the Common Stock, (III) 55,555 shares of Common Stock issuable upon exercise of Intracoastal Warrant 4 because
Intracoastal Warrant 4 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal
Warrant 4 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof,
together with the holder’s affiliates, and any other persons acting as a group together with the holder or any of the holder’s
affiliates, of more than 4.99% of the Common Stock, (IV) 55,000 shares of Common Stock issuable upon exercise of Intracoastal
Warrant 5 because Intracoastal Warrant 5 contains a blocker provision under which the holder thereof does not have the right to
exercise Intracoastal Warrant 5 to the extent (but only to the extent) that such exercise would result in beneficial ownership
by the holder thereof, together with the holder’s affiliates, and any other persons acting as a group together with the
holder or any of the holder’s affiliates, of more than 4.99% of the Common Stock, and (V) 12,083 shares of Common Stock
issuable upon exercise of Intracoastal Warrant 6 because Intracoastal Warrant 6 contains a blocker provision under which the holder
thereof does not have the right to exercise Intracoastal Warrant 6 to the extent (but only to the extent) that such exercise would
result in beneficial ownership by the holder thereof, together with the holder’s affiliates, and any other persons acting
as a group together with the holder or any of the holder’s affiliates, of more than 4.99% of the Common Stock. Without such
blocker provisions, each of the Reporting Persons may have been deemed to have beneficial ownership of 1,549,821 shares of Common
Stock.

(c)
Number of shares as to which each Reporting Person has:

(i)
Sole power to vote or to direct the vote: 0 .

(ii)
Shared power to vote or to direct the vote: 1,338,366 .

(iii)
Sole power to dispose or to direct the disposition of 0 .

(iv)
Shared power to dispose or to direct the disposition of 1,338,366 .

Item 5.Ownership of Five Percent or Less of a Class

Not
applicable.

Item 6.Ownership of More than Five Percent on Behalf of Another Person.

Not
applicable.

Item 7.

Identification
and Classification of the Subsidiary Which Acquired the Security Being Reported on By
the Parent Holding Company

Not
applicable.

Item 8.Identification and Classification of Members of the Group

Not
applicable.

Item 9.Notice of Dissolution of Group

Not
applicable.

Item
10. Certification

By
signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are
not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were
not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than
activities solely in connection with a nomination under §240.14a-11.

Page 7 of 9

SIGNATURE

After
reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true,
complete and correct.

Date:
February 15, 2019

/s/ Mitchell P. Kopin

Mitchell P. Kopin

/s/ Daniel B. Asher

Daniel B. Asher

Intracoastal Capital LLC

By:

/s/
Mitchell P. Kopin

Mitchell P. Kopin, Manager

Page 8 of 9

Exhibit
1

JOINT
FILING AGREEMENT

The
undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned
and that all subsequent amendments to this statement on Schedule 13G may be filed on behalf of each of the undersigned without
the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the
timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein
and therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to
the extent that he or it knows or has reason to believe that such information is inaccurate.